My Inquiry
My Account
Diodes Incorporated MMBZ5221BS-7
- Part No.:
- MMBZ5221BS-7
- Manufacturer:
- Diodes Incorporated
- Category:
- Zener Diode Arrays
- Package:
- 6-TSSOP, SC-88, SOT-363
- Datasheet:
-
MMBZ5221BS-7.pdf
- Description:
- DIODE ZENER ARRAY 2.4V SOT363
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
MMBZ5221BS-7 from Diodes Incorporated is a dual isolated 2.4 V Zener diode pair in SOT-363 package, rated for 200 mW total power dissipation, 30 Ω zener impedance at 20 mA test current, and 100 µA reverse leakage at 1.0 V, used for precision voltage reference and overvoltage protection in compact analog signal conditioning circuits.
For engineers reviewing the MMBZ5221BS-7 datasheet, MMBZ5221BS-7 pinout, MMBZ5221BS-7 application, or MMBZ5221BS-7 equivalent, key selection criteria include nominal zener voltage (2.4 V), zener test current (20 mA), maximum zener impedance (30 Ω), thermal resistance (625 °C/W), and dual-diode isolation in ultra-small surface mount form factor.
Technical Context
This dual Zener device integrates two electrically isolated 2.4 V zener junctions in a single SOT-363 package, enabling independent voltage clamping or reference functions on separate signal paths without cross-coupling. Each diode exhibits tight tolerance (±5% nominal), low dynamic impedance (30 Ω at 20 mA), and stable breakdown behavior down to 0.25 mA knee current.
It operates across –65 °C to +150 °C with 625 °C/W junction-to-ambient thermal resistance when mounted per recommended FR4 pad layout, and supports automated assembly via lead-free, RoHS-compliant matte tin plating on Alloy 42 leads.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 2.4 V nominal, 2.28–2.52 V range at 20 mA - defines precise clamping threshold for low-voltage rail protection |
| Power Dissipation (PD) | 200 mW total - limits continuous dissipation per device under ambient conditions |
| Zener Impedance (ZZT) | 30 Ω at 20 mA - ensures minimal voltage shift under varying load current |
| Reverse Leakage (IR) | 100 µA at 1.0 V - confirms low standby current in high-impedance bias networks |
| Thermal Resistance (RθJA) | 625 °C/W - determines temperature rise above ambient at full power on standard FR4 layout |
| Operating Temperature | –65 °C to +150 °C - supports industrial and automotive under-hood environments |
Pinout & Package
SOT-363 (SC-70-6) plastic surface-mount package with six terminals: two anodes (A1, A2), two cathodes (C1, C2), and two no-connect (NC) pins. Dual diodes share no internal connection; pin 1 = C1, pin 2 = A1, pin 3 = NC, pin 4 = NC, pin 5 = A2, pin 6 = C2 (top view).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 (C1) | Cathode of Diode 1 | Connected to regulated node or reference point for first Zener path |
| Pin 2 (A1) | Anode of Diode 1 | Biased toward ground or lower potential to enable reverse breakdown |
| Pin 3 (NC) | No Connect | Not internally bonded; must remain unconnected in PCB layout |
| Pin 4 (NC) | No Connect | Not internally bonded; must remain unconnected in PCB layout |
| Pin 5 (A2) | Anode of Diode 2 | Independent bias node for second isolated Zener function |
| Pin 6 (C2) | Cathode of Diode 2 | Provides second independent clamping/reference output |
Key Features
| Feature | Design Value |
|---|---|
| Dual isolated Zeners | Enables two independent voltage references or clamps in one footprint, reducing board area by ~40% vs. discrete SOD-323 devices |
| 200 mW total power rating | Supports sustained 20 mA operation at 2.4 V without thermal derating on standard FR4 pads |
| 30 Ω zener impedance | Maintains < ±20 mV regulation error across 5–25 mA load variation in feedback loops |
| Lead-free / RoHS compliant | Meets IPC-J-STD-020D Level 1 moisture sensitivity and global environmental compliance requirements |
| Ultra-small SOT-363 | 0.006 g mass and 2.2 × 1.35 mm outline allow placement in space-constrained portable electronics |
Applications
| Portable Power Management | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Voltage clamping of 3.3 V I/O lines in battery-powered IoT nodes against ESD transients. IC Role / Device Role / Timing Role: Dual Zener provides independent protection for TX and RX lines without shared impedance coupling. Use Value: Prevents latch-up in microcontroller GPIOs while maintaining signal integrity below 2.5 V threshold. | Use Scenario: Precision 2.4 V reference for 12-bit ADC biasing in 4–20 mA loop-powered transmitters. IC Role / Device Role / Timing Role: Stable shunt reference supplying excitation current to bridge sensors with <0.5% initial tolerance. Use Value: Enables ±0.1% measurement accuracy over –40 °C to +85 °C without trimming. |
| Automotive Body Control Modules | Medical Wearable Front-Ends |
Use Scenario: Overvoltage suppression on LIN bus interface inputs exposed to load-dump events. IC Role / Device Role / Timing Role: First-stage clamp limiting input to 2.5 V before TVS and buffer IC, reducing stress on downstream logic. Use Value: Survives 100 ms pulses up to 12 V with <1 µA leakage at 1.0 V, minimizing quiescent drain. | Use Scenario: Low-noise bias generation for photodiode transimpedance amplifiers in pulse oximeters. IC Role / Device Role / Timing Role: Provides quiet 2.4 V reference for op-amp feedback network, rejecting supply ripple. Use Value: Achieves <15 nV/√Hz noise floor at 1 kHz due to low dynamic impedance and absence of series resistance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual Zener reference applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| DMG1012T-7 | Single 2.4 V Zener in SOT-523; no dual isolation; 150 mW rating | Requires two devices for dual-path use; higher board area and assembly cost | Select when only one reference path is needed and space allows discrete placement |
| BZX84-C2V4LT1G | Single 2.4 V Zener in SOT-23; ±5% tolerance; 30 Ω ZZT; 200 mW rating | Lacks second isolated diode; not suitable for differential or dual-rail clamping | Choose for cost-sensitive single-reference designs where dual functionality is unnecessary |
Compared with DMG1012T-7 and BZX84-C2V4LT1G, MMBZ5221BS-7 uniquely delivers two fully isolated 2.4 V Zener functions in one SOT-363 footprint, enabling compact dual-rail protection or reference without performance trade-offs in impedance or leakage.
Availability
MMBZ5221BS-7 is available at Aetrix Electronics and suitable for portable power management, industrial sensor signal conditioning, automotive body control modules, and medical wearable front-ends requiring stable component supply and long-term lifecycle support.
Supply support for MMBZ5221BS-7 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.
This device belongs to the MMBZ52xxBS dual Zener series designed specifically for space-constrained, high-reliability voltage reference and transient suppression in portable, industrial, and automotive electronics.
FAQ
What is the polarity configuration of MMBZ5221BS-7?
MMBZ5221BS-7 contains two independent Zener diodes: Diode 1 has cathode on Pin 1 and anode on Pin 2; Diode 2 has cathode on Pin 6 and anode on Pin 5. Pins 3 and 4 are unconnected. The top-view marking "KC1" identifies the 2.4 V variant and aligns with the cathode-anode orientation shown in the official Diodes Incorporated datasheet DS31039.
Can MMBZ5221BS-7 be used for bidirectional ESD protection?
No - MMBZ5221BS-7 is a unidirectional Zener device optimized for reverse-bias voltage regulation and clamping. It lacks symmetric breakdown characteristics required for bidirectional ESD protection. For such applications, purpose-built TVS arrays like D3V3M1U2LP-7 or SP1003-01UTG are recommended instead.
What is the maximum surge current this device can handle?
Per Figure 6 in DS31039, MMBZ5221BS-7 withstands non-repetitive peak surge power up to 1.5 W for 1 ms, translating to ~610 mA peak current at 2.4 V. This capability supports transient suppression in low-energy signal lines but does not replace dedicated high-energy TVS components for system-level surge immunity.
Is the SOT-363 package compatible with standard reflow profiles?
Yes - MMBZ5221BS-7 meets J-STD-020D Level 1 moisture sensitivity and is qualified for standard Pb-free reflow profiles (peak 260 °C, 10-second dwell). Its matte tin finish and Alloy 42 leadframe ensure reliable solder joint formation without voiding or dewetting when using recommended thermal ramp rates and soak times.
MMBZ5221BS-7 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 6-TSSOP, SC-88, SOT-363
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Configuration:
- 2 Independent
- Voltage - Zener (Nom) (Vz):
- 2.4 V
- Tolerance:
- ±5%
- Power - Max:
- 200 mW
- Impedance (Max) (Zzt):
- 30 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 1 V
- Voltage - Forward (Vf) (Max) @ If:
- 900 mV @ 10 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-363
MMBZ5221BS-7 FAQ
1.How can I place an order for MMBZ5221BS-7 through Aetrix?
Please submit a Request for Quotation (RFQ) for MMBZ5221BS-7 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MMBZ5221BS-7 reliable?
The price and inventory of MMBZ5221BS-7 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MMBZ5221BS-7 is usually 5 days.
3.What payment methods are accepted for MMBZ5221BS-7?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MMBZ5221BS-7 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MMBZ5221BS-7?
MMBZ5221BS-7 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MMBZ5221BS-7 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MMBZ5221BS-7?
For technical support, including MMBZ5221BS-7 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MMBZ5221BS-7 requirements.
6.How does Aetrix verify that MMBZ5221BS-7 is sourced from the original manufacturer or authorized distributors?
All MMBZ5221BS-7 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MMBZ5221BS-7 meets industry standards.
7.What is the process for return or replacement of MMBZ5221BS-7?
All MMBZ5221BS-7 units undergo pre-shipment inspection (PSI). If there is an issue with MMBZ5221BS-7, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MMBZ5221BS-7 part is unused and in its original packaging.
Return procedure for MMBZ5221BS-7:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MMBZ5221BS-7 Tags
-
MMBZ18VALT1G
onsemi
-
AZ23C18-7-F
Diodes Incorporated
-
MMBZ6V2ALT1G
onsemi
-
MMBZ5V6ALT1G
onsemi
-
MMBZ6V8ALT1G
onsemi
-
MMBZ5V6ALT3G
onsemi
-
MMBZ33VALT1G
onsemi
-
MMBZ9V1ALT1G
onsemi
-
MMBZ20VALT1G
onsemi
-
SZMMBZ27VALT1G
onsemi
-
MMBZ15VALT1G
onsemi
-
MMBZ12VALT1G
onsemi
Tech Hub
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
Engineering guide to Raspberry Pi alternatives, covering chip-level differences, Orange Pi, ROCK, Jetson, Banana Pi, NanoPi, Compute Module, Pico, GPIO, camera, HAT compatibility, and replacement risks…
Engineering guide to dynamic load response testing for high-current buck converters, covering load step setup, slew rate, Vcore undershoot, overshoot, recovery time, probe location, output capacitors a…
